Sound-box.



A. HAYES.

SOUND BOX. APPLIOATION 'FILED JULY 1o. 1913.

Patented Ang. 26, 1913*.

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.ALBERT HAYES, OF SALT LAKE CITY, UTAH. ASSIGNOR TQ IOCATONE MFCir. C0. XNC.,

CORPORATION OE NEW YORK,

SOUND-BGE.

Lorient.

Specification of Letters Patent.

Application led July 10, 1913- Serial No- 'US$4- To all 'whom it may concern Be it known that I, ALnnnT Havas, a citizen of the United States, residing at Salt Lake' City, in the county of Salt Lake, Stat-e of Utah, have invented certain new and useful Improvements in Sound-Boxes, of which the following is a description, reference being had to the `.accompanying drawings, forming a part hereof.

My invention relates to sound boxes for graphophones or gramophones and has'for its object to produce a sound box in which the vibrating disk shall be so held that it 'will be permitted to vibrate only within such limits that the production of undesirable overtones is avoided and the sound reproduced is clear, strong and pure.

lV ith these and other objects hereinafter set forth in view my invention consists in the construction and combination of elements hereinafter described and particularly pointed out in the claims.

Referring to thc drawings: Figure 1 is a vertical sectional view of a sound box embodying my invention taken in a plane in line with the reproducer lever. Fig. 2' is a similar view taken on a plane at` right angles to that on which Fig. 1 is taken; and Fig. 3 is a top plan view partly broken away of the sound box.

ln the drawings l indicates the 'body or main member of the sound box having central opening l for the outlet of the Sound produced by the vibration ofthe disk or diaphragm 3. 4 indicates the cover member of the sound box which in the construction lshown tits into the main member l and is retained therein by screws 5.

The. inner .faces of the members l and 4 are waved or corrugated as shown, the corrugations of the cover 4C extending from the periphery inward to the central opening 7. 'lbesc corrugations are preferably formed on curved lines such as the. ares of circles drawn from centers located in a circle concentric with the disk or diaphragm 3 and between its cent er and its periphery.

The disk or diaphragm 3 has its periphery incloscd in a gasket. S ol yielding material such as semihard rubber and this gasket is held between the members l and -t of the sound box, the corrngations serving to fausc thc gasket to be com pressed at :regular intervals along liiies which are on the arcs of circles not concentric with the disk or diaphragm. The compression vof the gasket necessarily transmits pressure to the disk or diaphragm 3 so that the disk or diaphragm is held at its periphery between surfaces which are subjected to relatively high pres'- sure atsuecessive points while between such points the pressure is relatively low, the result being that the vibration of thc disk 0r diaphragm is materially modified or controlled with the eti'ect of eliminating objectionable overtones and giving clear, pure tones free from harshness.

rlhe means for vibrating the disk or diaphragm may be of any usual form. As here shown it consists of a lever l0 connected with the center of the disk or diaphragm and having trunnions ll carried in bearings formed in ears l2 onthe periphery of the body'or main member of the sound box. This lever is provided at its free end with a socket 13 for the usual needle orstylus.

Vi'hile the apparatus as thus described produces very satisfactory results I prefer to use with it a damper or bufl'er, prefer.

ably in the form of a disk 15 of paper or other non-reverlnrant material. This damper or buffer is arranged between the disk or diaphragm 3 and the face ofthe body or main member l of the sound box resting on the corrugations G. `lThis damper is preferably cut away centrally, the Cut out portion corresponding in diameter with the diameter of the central opening 2 and is glued or otherwise secured to one of the plates.

It will. of course. be understood that I do not desire to be limited to the details of construction shown and described as it is obvious that changes in form and construction may bel made without departing from the spirit of the. invention.

Having thus describedniy invention what I claim is:

1. In a sound box a body member having a central opening, and having its inner surface surroumling thc central opening corrugated. a gasket resting on the corrngations, and a disk supported by the gasket.

2. ln a sound box the combination with a disk and means l'or vibrating it-of means for clamping the disk comprising two plates having their adjacent faces waved or corrucorrugations and supporting thc disk.

3. ln a sound box the combination with the disk and means for vibrating it, of

"ated, and a gasket compressed between thc plates hevimg adjacent faces waved or coxam gevel-bereut material attached to one of the mates. v

ineens for clamping the disk eomprsing two This specification signed and witnessed d k h h h this 10th dey of July, A. D. 1913.

rugate a gas et on t e perp ery 0 t e v disk .muni compressed between the corruga- ALBERT HA ES tions, 0f the plates, and a damper of nonn the presence o- WM. F. DOYLE,

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